Fly screen



Patented Oct. 18, 1927.

UNITED STATES PHILIP SIMPSON ROSS, 0F MONTREAL, QUEBEC, CANADA.

FLY SCREEN.

Application led October 22, 1923. Serial N0. 669,990.

The invention relates to a ly screen as described in the presentspecification and illustrated in the accompanying drawings that formpart of the same.

The invention consists essentially of the novel features of constructionpointed out broadly and specifically in the claim for novelty followinga description containing an explanation in detail of an acceptable formof the invention.

The objects of the invention aie to furnish the public with an easymeans of ridding houses of fiies or other insects; to make this meanspossible without interfering in any way with the adjustability ofscreens in common use to-day; to furnish a device for the abovementioned purpose which, when included in the construction of screens,will not cause a rise in the cost of purchase of said screens; andgenerally to provide an economical, durable andefficient ily-screen.

In the drawings, Figure 1 is a perspective view of a screen for a windowor other opening, showing the invention.

Figure 2 shows a front elevation of the device.

Figure 3 is a vertical sectional view taken at the line 3-3 in Figure 2.

Figure 4 is a cross sectional view taken at the line 4-*4 in Figure 2.

Figure 5 is a vertical sectional view taken at the line 5-5 in Figure 2.

Figure 6 is a perspective view of one end binding strip.

Figure 7 is a perspective view of the other end binding strip.

Like numerals of reference indicate corresponding parts in the variousfigures.

Referring to the drawings, the screen 1 is formed of the wire mesh 2, inupper and lower sections 6 and 7 enclosed in the frame 8, said sectionsoverlapping each other, the upper section 6 being on the inside andhaving an outwardly bent and bound edge 9, and the lower section 7 beingon the outside, thereby forming an unobstructed passage 10 through whichflies may go outwards.

This device may be readily applied to the adjustable types of screen asillustrated in Figures 2, 3, 4, and 5, where the screen frame is shownin two parts 11 and 12, slidably dove-tailed together.

The sections 13, 14, 15 and 16 are secured to the fra-me 8, and as theinter-slidable parts 11 and 12 move backwards and forwards the wire meshmoves with them, the said sections overlapping both ways.

The wire mesh is secured to the angle binding strips 17 and 18, eachhaving the edges of the flanges 19 and 20 curled inwardly to form grips21 and 22 for securing said wire mesh, the other flanges 23 and 24 ofsaid binding strips being at right angles to the ones 19 and 20, andbeing extended' at 23 and 26 to enable the binding strip and stop toreach the wire sections 14 and 15.

In section 14 the wire mesh is bent inwardly towards the lower end andparticularly the overlap 27, and in sect-ion 15 the mesh is bentoutwardly towards the u per end and particularly the overlap 28 to ormthe fly outlet passage 10, and the curves of the said bent nettingcorrespond to the extended ianges of the binding strips, therebyeliminating any other opening for the iiies than the regular passage,but at the same time the sliding movement of the adjustable parts 9 and10 is in no way interfered with.

It has been found after patient observation that it is the inclinationof flies to walk in an upward direction, and it has been noticed thatthey seldom travel downwardly for more than an inch or two. The device,described above, is therefore, so constructed that flies, walking up thescreen on the inside will walk out through the outlet passage formed bythe overlapping sections and will not, habitually, come, back.

There have been many devices'conceived which were designed to preventflies from entering houses and other enclosed spaces, but it is thoughtthat this device is quite novel in that it provides a means of gettingrid of iiies which have already gained entrance, without giving theinmates of houses any trouble whatsoever.

Vhat I claim is In a fly screen, a pair of lower slidablf screens and apair of upper slidable screens voverlapping the'lower screens, saidscreens outer frame having transverse slideways, an

inner ramesiiding in said outer frame and vertical` end vangle barshaving one section of each curled to grip the screens and the othersection of each extendedV to engage the faces of the screen in thesliding movements.V 10 `Signed at Montreal, Canada, this 13th day ofOctober, `1923. l V- PHILIPY sIMisoN iR-oss.

